Launched in January 2016, the "CILogon 2.0" project provides an IAM platform that enables scientists to work together to meet their IAM needs more effectively so they can allocate more time and effort to their core mission of scientific research. Partnerships with the LIGO Scientific Collaboration, the NANOGrav Physics Frontiers Center, and DataONE ensure that the "CILogon 2.0" project makes a real contribution to scientific collaborations. The project also provides training and outreach to additional scientific collaborations, and the project supports integration with the XSEDE national-scale cyberinfrastructure for scientific research in the US. Prior to the "CILogon 2.0" project, the CILogon and COmanage projects separately developed platforms for federated identity management and collaborative organization management. Federated identity management enables researchers to use their home organization identities to access cyberinfrastructure, rather than requiring yet another username and password to log on. Collaborative organization management enables research projects to define user groups for authorization to collaboration platforms (e.g., wikis, mailing lists, and domain applications). The "CILogon 2.0" project integrates and expands on the existing CILogon and COmanage software to establish an integrated Identity and Access Management (IAM) platform for cyberinfrastructure, provided as an InCommon research and scholarship (R&S) service and internationally federated via eduGAIN. This IAM platform serves the unique needs of research collaborations, namely the need to dynamically form collaboration groups across organizations and countries, sharing access to data, instruments, compute clusters, and other resources to enable scientific discovery. The project provides a software-as-a-service platform to ease integration with cyberinfrastructure, while making all software components publicly available under open source licenses to enable re-use.